f47c217cc8
git-svn-id: http://skia.googlecode.com/svn/trunk@3502 2bbb7eff-a529-9590-31e7-b0007b416f81
18 lines
682 B
C++
18 lines
682 B
C++
// included by QuadraticParameterization.cpp
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// accesses internal functions to validate parameterized coefficients
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#include "Parameterization_Test.h"
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bool point_on_parameterized_curve(const Quadratic& quad, const _Point& point) {
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double coeffs[coeff_count];
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implicit_coefficients(quad, coeffs);
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double xx = coeffs[ xx_coeff] * point.x * point.x;
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double xy = coeffs[ xy_coeff] * point.x * point.y;
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double yy = coeffs[ yy_coeff] * point.y * point.y;
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double x = coeffs[ x_coeff] * point.x;
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double y = coeffs[ y_coeff] * point.y;
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double c = coeffs[ c_coeff];
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double sum = xx + xy + yy + x + y + c;
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return approximately_zero(sum);
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}
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